DEVICE HAVING POSITIONING FUNCTION, POSITIONING RESULT RECEIVING DEVICE, AND POSITIONING RESULT UTILIZATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To flexibly utilize a positioning result in accordance with the reliability of the positioning result required in an application and a system, in the application and system utilizing the positioning result obtained on the basis of a signal from an artificial satellite used in a satellite positioning system.SOLUTION: An authentication level based on at least one of the number and ratio of authenticated GPS satellites 2 of the GPS satellites 2 used for positioning is calculated. When the positional information indicating the positioned current position is transmitted to a roadside machine 300 other than the own device, the calculated authentication level is also attached to the positional information and is transmitted.